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The WordPress plugin “Spam protection, Anti-Spam, FireWall by CleanTalk” (cleantalk-spam-protect) contains an authorization bypass in the checkWithoutToken function affecting all versions up to and including 6.71. When the site is configured with an invalid CleanTalk API key, the plugin falls back to a request validation path that relies on reverse DNS (PTR record) checks; an attacker can spoof PTR records to make requests appear to originate from a trusted cleantalk.org domain. This allows unauthenticated attackers to trigger unauthorized installation and activation of arbitrary WordPress plugins. While the issue does not inherently provide RCE, it can be leveraged into RCE by installing/activating a malicious plugin or a separate vulnerable plugin.
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14 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A critical authorization-bypass vulnerability in the WordPress “Spam protection, Honeypot, Anti-Spam by CleanTalk” plugin (<= 6.71) where reverse DNS (PTR record) spoofing can bypass trust checks in the checkWithoutToken path (when an invalid API key is configured), enabling unauthenticated arbitrary plugin installation and potentially leading to RCE via subsequently installed/activated plugins.
An authorization bypass in the CleanTalk WordPress plugin (Spam protection, Anti-Spam, FireWall by CleanTalk) via reverse DNS (PTR) spoofing in the checkWithoutToken function, enabling unauthenticated arbitrary plugin installation/activation and potential RCE chaining.
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Cross-references every affected SKU, including bundled OEM variants.
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